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IRF3205PBFInfineon Technologies
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x 3 | |
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2N2222ADiotec
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x 1 | |
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Rotary potentiometer |
x 1 | |
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1N4007 |
x 1 | |
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Resistor 100 ohm |
x 3 | |
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Resistor 2.21k ohm |
x 1 | |
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Resistor 1k ohm |
x 1 |
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Soldering Iron Wire |
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Soldering iron |
DIY PC controlled high power PEMF Therapy Device
PEMF or Pulsed Electromagnetic Field therapy is a type of therapy that uses electromagnetic fields to improve health and well-being. The basic idea behind PEMF is that it can influence the body at the cellular level, promoting healing and regeneration. The electromagnetic fields generated by PEMF devices can penetrate the body and interact with the cells, tissues, and organs.
PEMF therapy is used in various medical and wellness applications. It is commonly employed for pain management, wound healing, and bone-related disorders.
In several of my previous videos , I described simple ways to cheaply make such a device yourself. This time I will describe a way to make a PEMF device that will receive the frequency signal from an external device such as a PC with appropriate software, a mobile phone, or a commercial PEMF device that has a voltage output, whereby this device would amplify that signal.
The magnetic field that can be radiated by this device reaches a value of up to 150 Gauss, and with the parallel addition of Mosfets and a powerful power supply, stronger fields can easily be achieved.
Of course, the radiation coil plays an important role here, which you can see more about in the videos mentioned above. However, I should also mention that according to NASA research, fields of 1 to 4 Gauss are sufficient for effective therapy.
The device also has a meter of the strength of the emitted magnetic field made with an Arduino microcontroller, but this time we will leave this part out for a simpler design.
Only a few components are used when making the device
- 3 Power Mosfets (I use IRF3205, but any with similar characteristics can be used)
- Three 100 Ohm resistors
- Diode 1N5408
- 10K Potentiometer
- Signal shifter (one NPN transistor and two resistors)
- Power supply 12 V minimum 60 Watts
- And a coilс in which the magnetic field is generated and radiated
- Optionally I installed a power meter, and I will describe its construction in one of my next videos.
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The power meter is a very useful addition to the device, but it is a little more complex to make, so you can also use a standard milli or microammeter with a moving needle, in which case the sensitivity of the instrument is adjusted using the trimmer potentiometer.
Now let's see how the device works in real conditions
First, as a PEMF signal source I use my PC with the "CHIamp" software created by Ken Uzzell, which you can download for free on the spectrotek site. Unfortunately, there software is in .exe format and the anti-virus program detects it as a virus, but after I downloaded it, I scanned it with multiple anti-virus programs and it turned out to be clean. CHIamp is Inspired by the Infratonics instrument. Application contains predefined programs for several diseases, but we can also create our own custom program. We can change the intensity of the signal, then the shape of the signal, and here the duration of the therapy.
From the Line Out output of the sound card, we bring the signal to the input of the device, and start the program. Next we move the potentiometer to a certain degree and as we see the meter responds. If we get closer a magnet near the coil, it oscillates with the frequency set in the application.
Now let me briefly explain the relationship between coil type, radiation, and power
- A coil with a larger diameter radiates a field over a larger area, but with a lower intensity. The smaller coil radiates a directional stronger magnetic field, but over a smaller area.
- A coil with lower resistance (made with thicker wire) generally radiates a stronger magnetic field than one with higher resistance (made with thinner wire)
- It is very important to emphasize that the minimum ohmic resistance of the coil should not be lower than 0.5 ohms. In the case where a coil with low resistance is used, the power supply should be capable of delivering a current of 10 Amps and more.
Instead of a personal computer, we can use as a source of PEMF signal if we have a commercial PEMF device with an output signal port, or simply an android smartphone with a Signal Generator application.
And finally a short conclusion. This universal device is actually only a PEMF signal amplifier and not a complete PEMF device, but therefore it can be connected to various sources of such a signal, and even previously recorded audio material on some kind of information carrier, for example a USB stick.
The device is installed in a suitable box made of PVC board with a thickness of 3 and 5 mm and coated with a colored self-adhesive label.
DIY PC controlled high power PEMF Therapy Device
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